I'd suggest allocating different people to testing different parts of the game. You could have a group that tests just Course Forge, and other groups that test different areas of Perfect Golf (physics, GUI, etc.). I think this would ensure that all parts of the game get enough attention. It would also make it easier to collate the information and figure out what areas need improvement/fixing.
I'm definitely interested in helping out, particularly on the Course Forge side of things, but also Perfect Golf. I've already created a few terrains in Unity based on courses I've played. I think I must be one of the youngest members (if not the youngest) here on the forum (19 y/o), so it might be of interest to get a different perspective on the game. I'm studying mechanical engineering and play off a +2 handicap so I also am very familiar with the game of golf at a high level, as well as the physical reactions of a well struck ball.
I have a bit of spare time to dedicate to PG and CF (off uni until March). I'm a mac user as well if that makes any difference.